Rotary



E. O. JONES ROTARY Filed Aug. 29. 1922 INVEN TOR.

BY E

Patented May 6, 1924.

UNITED s'm'ras ELONZO 0. JONES, OEHOBBY, TEXAS.

ROTARY.

Application filed August 29, 1922. Serial No. 585,018.

To all whom it may concern.

Be it known that I, ELONZO O. J oxns, citizen of the United States, residing at Hobby, in the county of Fort Bend and State of Texas, have invented certain new and useful Improvements in Rotaries, of which the following is a specification.

This invention relates to new and useful improvements in a rotary, and has particular relation to a rotary attachment for engaging with and driving the drill stem' in rotary drilling.

One object of the invention is to provide a device of the character described specially designed to be used in connection with a rotary for engagement with the grief pipe of the drill stem whereby said stem may be rotated.

Another object of the invention is to provide a device of the character described which is equipped with grip rings or rollers forming bearings which rotate as thegrief stem is raised or lowered thereby relieving said stem from wear due to friction.

A further feature of the invention-resides in the provision of a device of the character described which may be used with diiferent sizes of grief stem.

A still further feature of the invention resides in the provision of a drill stem driving member which may be cheaply and easily constructed and which is convenient in use.

IVith the above and other objects in view the invention has particular relation to certain novel features of construction, operation and arrangement of parts, an example of which is given in this specification and illustrated in the accompanying drawings, wherein Figure 1 is a plan .view of the device.

Figure 2 is a bottom end view.

Figure 3 is a vertical sectional view, taken on the line 3-3 of Figure 1, and

Figure at is a side view thereof as applied to a rotary.

In the drawings the numeral 1 designates the rotary base plate, and the numeral 2 designates the rotary table thereon which is driven by the pinion 3 fixed on the drive shaft 4;. The rotary table has a central opening to receive the bushing. 5 of the ordinary and well known construction whose inner side has oppositely disposed grooves which have not been shown for the reason that they are common in the conventional type of rotary. The numeral 6 designates a drive block whose lower end is reduced and tapered as shown, forming the abrupt shoulder 8. The reduced portion 7 has oppositely disposed ribs9, 9 which fit in the grooves of the bushing 5 to interlock the block with said bushing. The upper end of'the block 6 is provided with two pairs of oppositely disposed sockets 10,v 10 in which the pairs of oppositely disposed rollers 11, 11 work. These pairs of rollers are fixed on the shafts 12, 12 whose ends have journal bearings in said block, and the rollers are enclosed by a suitable cover plate 13 which is bolted or otherwise secured to the upper end of the block. The cover plate has a central opening 1 aligned with a similar opening 15 through the block, provided to permit the grief stem 16 to pass there through. This grief stem is attached to the upper end of the drill stem 17 and forms the upper joint thereof and it is provided with longitudinal V-shaped grooves 18 into which the contiguous corners of the grip rings 1l fit. In

the process of drilling it is necessary to elevate and lower the drill stem, and during this movement the grip rings 11 rotate so as to minimize the friction and wear of the grief stem. As the rotary table turns during drilling operations the grip rings by engaging in said grooves force the'grief pipe and the stem to rotate with it and they thus drive the bit attachedto the lower end of the drill stem.

I/Vhen the grip rings become worn out new ones may be readily substituted and rip rings of varying diameters may be use to accommodate grief stems of varying sizes.

What I claim is The combination with a rotary table having a downwardly converging seat therethrough, of a driving block whose upper end is formed with an enlarged head and whose lower end is reduced and downwardly tapered forming an annular shoulder which seats on the table, means for interlocking said block with said rotary table, said block having a vertical central passageway provided to receive a grief pipe and the upper .In testimony whereof I have signed my end thereof having oppositely disposed sockname to this specification in the presence of ets, pipe engaging grip rings on opposite two subscribing witnesses.

sides of said passageway, and rotatably VELONZO O. JONES. mounted in said sockets and a removable \Vitnesses: cover plate secured to the block and inclos- E. V. HARDWAY,

ing said rings. W. H. DUNLAY. 

